256410512849 has 8 divisors (see below), whose sum is σ = 258992531328. Its totient is φ = 253829343600.

The previous prime is 256410512833. The next prime is 256410512921. The reversal of 256410512849 is 948215014652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256410512849 - 2⁴ = 256410512833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256410517849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403544 + ... + 821990.

It is an arithmetic number, because the mean of its divisors is an integer number (32374066416).

Almost surely, 2^256410512849 is an apocalyptic number.

It is an amenable number.

256410512849 is a deficient number, since it is larger than the sum of its proper divisors (2582018479).

256410512849 is a wasteful number, since it uses less digits than its factorization.

256410512849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424615.

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 256410512849 in words is "two hundred fifty-six billion, four hundred ten million, five hundred twelve thousand, eight hundred forty-nine".